Vista volume control icon missing

Which operating system ??

In Windows and on a Mac, you can use an icon shaped like an audio speaker to adjust the computer's volume or mute the sound output completely.

Whichever operating system you are running, it is possible to remove the volume icon from the screen.

If you have removed the volume icon accidentally, you may not have a convenient way to adjust your computer's sound volume.

Restore the sound icon to resume using it to adjust the volume or mute your computer's sound output.

Click the "System Preferences" icon on the dock.
If you have removed this icon from the dock, click the Apple icon at the top of the screen, then click "System Preferences."


Click the "Sound" icon in the "System Preferences" window.

Place a check in the box at the bottom of the window labeled "Show volume in menu bar."
The sound icon appears at the top of the screen.
Close the window to resume using your computer.
Restoring the sound icon in Windows 7

Click the Windows Orb (Start button), then click "Control Panel."
Click "Taskbar and Start Menu."
If you do not see this icon, click the "View by:" drop-down menu at the top of the window and select "Small icons."
Click the "Taskbar" tab, then click the "Customize" button.
Click the drop-down menu next to "Volume" and select "Show icon and notifications."
Click "OK" twice and close the Control Panel.
Restoring the sound icon in Windows Vista

Click the Windows Orb (Start button), then click "Control Panel."
Double-click "Taskbar and Start Menu."
If you do not see this icon, click the "Classic View" link.
Select the "Notification Area" tab. Place a check in the box labeled "Volume."
Click "OK" and close the Control Panel.
Restoring the sound icon in Windows XP

Click the "Start" button, then click "Control Panel."
Double-click the "Sounds and Audio Devices" icon, or click "Sounds, Speech and Audio Devices," then click "Sounds and Audio Devices."
Place a check in the box labeled "Place volume icon in the taskbar."
Click "OK" and close the Control Panel.
Restoring the sound icon in Windows 2000

Click the "Start" button, then click "Settings" and "Control Panel."
Double-click "Sounds and Multimedia."
Place a check in the box labeled "Show volume control on the taskbar."
Click "OK" and close the Control Panel.
Restoring the sound icon in Windows Millennium Edition (ME)

Click the "Start" button, then click "Settings" and "Control Panel."
Double-click "Sounds and Multimedia."
If you do not see this icon, click the "View All Control Panel Options" link.
Place a check in the box labeled "Show volume control on the taskbar."
Click "OK" and close the Control Panel.
Restoring the sound icon in Windows 98

Click the "Start" button, then click "Settings" and "Control Panel."
Double-click "Multimedia."
Click the "Audio" tab.
Place a check in the box labeled "Show volume control on the taskbar."
Click "OK" and close the Control Panel.

Read this:
http://www.mydigitallife.info/volume-battery-power-or-network-icon-disappear-or-missing-from-vista-taskbar-notification-area-system-tray/

Go to control panel. Click SOUND AUDIO DEVICES, click PLACE VOLUME ICON IN TASKBAR, then click APPLY. done

Volume Control - The volume icon does not appear in the notification area (system tray)
Go to Start/Control Panel/Sounds and Audio Devices.
On the Volume Tab under Device Volume, put a check in the box that reads: Place volume icon in the taskbar.(Classic View)

If that has been tried:
Place your XP CD in then go to Start/Run and type in:
EXPAND -R X:\I386\powrprof.dl_ C:\Windows\System32 (X- is your CD location)
Once done: Go to Start/Run and type in: regsvr32 stobject.dll
or
How to fix system tray icons missing in vista and xp
For those who like to do it manually, open the command prompt and type the following two commands one by one:

From the command prompt, type
"taskkill /f /im explorer.exe"
"explorer.exe"

Hope it helps.

Open the Control panel 2. Open the "Sounds and Audio Devices" icon. 3. Verify the "Place volume icon in the taskbar" checkbox is checked. If this option is not available or is grayed out, skip to the next section of this document. 4. If you were able to check this box, click ok and close out of this window and the Control Panel. 5. Double-click the sound icon in the Systray and verify that all the sound volumes are mid-way or higher.Check ur registry. Check if the sound registry key is enabled or disabled. There could be an error in registry, run registry cleaner reg in out to scan for errors.

First verify you see a small sound icon in the Systray . If this icon is missing follow the below section
1. Open the Control panel
2. Open the "Sounds and Audio Devices" icon.
3. Verify the "Place volume icon in the taskbar" checkbox is checked. If this option is not available or is grayed out, skip to the next section of this document.
4. If you were able to check this box, click ok and close out of this window and the Control Panel.
5. Double-click the sound icon in the Systray and verify that all the sound volumes are mid-way or higher.

Check Windows services. Right Click My Computer and Manage. Choose Services and Application

http://www.getpcmemory.com/drivers/download-toshiba-satellite-pro-l300-notebook-windows-xp-drivers/

go to your computer manufacturers website and download the latest audio drivers

try restarting the computer, then go back to the Notification Area for your Taskbar, then verify if the volume icon is active for you to select.

otherwise, check this site
:
http://helpdeskgeek.com/windows-xp-tips/sound-or-volume-tray-icon-missing-in-windows-vista/

click 'control panel'
click 'Sounds and Audio Devices'
Check the box that says 'Place volume icon in the task bar'